TWI811281B - absorbent article - Google Patents

Abstract

To provide an absorbent article that is easy to put on when put on and easy to wipe off the wearer's skin when taken off. The absorbent article (10) has a front-to-back direction (L), a width direction (W) orthogonal to the front-to-back direction, a front body area (S1), a rear body area (S2), and is arranged in the front body area and the rear body area. The crotch area (S3) of the rear girth area, the side locking portion (60) for locking the front girth area and the rear girth area, and the absorbent core (51) provided at least in the crotch area. The folding line (FL) for folding the absorbent article in half extends in the width direction in the crotch area. The first distance (L1) from the front edge of the absorbent core to the front edge of the front girdle is longer than the second distance (L2) from the rear edge of the absorbent core to the rear edge of the rear girdle. The difference between the distance from the fold line to the rear edge of the absorbent core and the distance from the fold line to the front edge of the absorbent core (L3) is the length in the front-rear direction of the area in the front body area that overlaps the absorbent core (L4) longer.

Description

absorbent articles

The present invention relates to absorbent articles such as disposable diapers.

As described in Patent Document 1, absorbent articles such as so-called trouser-type disposable diapers are known. The absorbent article described in Patent Document 1 has a crotch area arranged on the wearer's crotch area and a crotch area arranged on the wearer's crotch area. The carcass girth area includes a front carcass girth area and a rear carcass girth area, and the front carcass girth area and the rear carcass girth area are locked with each other through a locking portion. The absorbent core that absorbs the wearer's body fluids is located in the crotch area.

[Patent Document 1] Japanese Patent Application Publication No. 2017-140072

[Problem to be solved by the invention]

As a result of painstaking research, the inventors found the following problems to be solved. That is, a helper, such as a parent of an infant, replaces the absorbent article with the infant-like wearer. When a helper removes an absorbent article from a lying down wearer, a part of the girdle area of the absorbent article may be torn, and the torn girdle area may be used to wipe the wearer's skin. .

However, if the girth area is too hard, when soft feces enters the recessed area around the wearer's genitals or groin area, it will be difficult to wipe away the soft feces, and the wearer's skin may be injured. On the other hand, if the girth area is too soft and the absorbent article is pulled up to the waist height of the wearer by grasping the girth area during wearing, the pulling force may not be able to move upward from the girth area. The absorbent core delivers fully. In this case, it becomes difficult to pull up the absorbent core over the bulge of the wearer's skin, such as the bulge of the buttocks, and it is difficult to fully pull up the crotch area of the absorbent article.

Therefore, it is desired to have an absorbent article that is easy to put on when put on and easy to wipe off the wearer's skin when taken off. [Technical means to solve problems]

A form of absorbent article having: a front-to-back direction, a width direction orthogonal to the aforementioned front-to-back direction, a front body area, a rear body area, and a crotch area disposed in the aforementioned front body area and the aforementioned rear body area. zone, a side locking portion for locking the aforementioned front girth region and the aforementioned rear girth region, and an absorbent core provided in at least the aforementioned crotch region. The folding line for folding the absorbent article in half extends in the crotch region along the width direction. The first distance from the front end edge of the absorbent core to the front end edge of the front girdle area is longer than the second distance from the rear end edge of the absorbent core to the rear end edge of the rear girdle area. The difference between the distance from the fold line to the rear edge of the absorbent core and the distance from the fold line to the front edge of the absorbent core is greater in the front-to-back direction than the area in the front body area that overlaps the absorbent core. Longer.

(1) Summary of embodiment From the description of this specification and the attached drawings, at least the following matters can be understood.

A form of absorbent article having: a front-to-back direction, a width direction orthogonal to the aforementioned front-to-back direction, a front body area, a rear body area, and a crotch area disposed in the aforementioned front body area and the aforementioned rear body area. area, a side locking portion for locking the aforementioned front body area and the aforementioned rear body area, and an absorbent core provided in at least the aforementioned crotch area, and the folding line for folding the aforementioned absorbent article is at the aforementioned crotch area. The lower zone extends along the aforementioned width direction, and the first distance from the front edge of the aforementioned absorbent core to the front edge of the aforementioned front girdle area is longer than the first distance from the rear end edge of the aforementioned absorbent core to the rear end edge of the aforementioned rear girdle area. The second distance is longer, and the difference between the distance from the aforementioned fold line to the rear edge of the aforementioned absorbent core and the distance from the aforementioned fold line to the front edge of the aforementioned absorbent core is greater than the difference between the aforementioned front body area and the aforementioned absorbent core. The length of the area in the aforementioned front-to-back direction is longer.

According to this aspect, the first distance from the front end edge of the absorbent core to the front end edge of the front body area is longer than the second distance from the rear end edge of the absorbent core to the rear end edge of the rear body area, so the front body The area within the enclosure where there is no absorbent core becomes larger. In this way, because the soft area in the front girdle area becomes larger, the assistant will not injure the wearer's skin when taking off the absorbent article and can easily use the front girdle area to wipe the wearer's skin.

On the other hand, the difference between the distance from the fold line to the rear edge of the absorbent core and the distance from the fold line to the front edge of the absorbent core is longer than the length of the area in the front body area that overlaps with the absorbent core in the front-to-back direction. . Therefore, in a state where the absorbent article is folded along the fold line, the absorbent core extends upward (backside) longer in the rear girth area than in the front girth area. Because the absorbent core with higher rigidity extends longer toward the rear of the rear girdle area, when the absorbent article is pulled up to the waist height of the wearer by grasping the side locking portion, the upward pulling force can be upward. The absorbent core placed in the rear torso area provides full transmission. In this way, it becomes easier to pull the absorbent core upward over the bulge of the wearer's buttocks.

As described above, it is possible to provide an absorbent article that is easy to put on when worn and easy to wipe off the wearer's skin when taken off.

According to a preferred aspect, the absorbent article further has an absorbent main body. The absorbent main body includes the aforementioned absorbent core and a liquid-impermeable film disposed on the non-skin surface side of the aforementioned absorbent core. The absorbent article is more liquid-impermeable than the aforementioned liquid-impermeable film. The area further forward of the front end edge of the film accounts for more than 50% of the length of the side locking portion in the front-rear direction.

According to this aspect, the area without the liquid-impermeable film (harder than a sheet such as nonwoven fabric) accounts for more than 50% of the length of the side locking portion, so a wide area suitable for wiping the wearer's skin can be secured.

According to a preferred aspect, the entire front region of the front body region that is further forward than the front edge of the absorbent core is composed of four or more sheets.

The entire front girdle area is equivalent to the front side of the front edge of the absorbent core. When the rear girdle area is padded under the wearer's buttocks and the side locking parts are torn, it is easy to wipe the wearer's skin. skin area. The entire area that is easy to wipe off the wearer's skin is composed of more than four sheets, and body fluids are not easily penetrated, so the assistant's hands are not easily soiled.

According to a preferred aspect, the number of sheets constituting the entire area in front of the front edge of the absorbent core in the front girdle area is the same as or greater than the number of sheets constituting the area behind the rear girdle area. At least, the rear area overlaps the front area in a state of being folded along the fold line.

According to this aspect, the number of sheets in the front area is not excessive, and the rigidity of the front area is prevented from becoming too high, so that body fluids adhering to the skin can be easily wiped off using the front area. On the other hand, the number of sheets in the back area should not be too small, and when the absorbent article is pulled up to the waist height of the wearer by grasping the side locking portion, the pulling force should be sufficient from the back area to the absorbent core. passed on.

According to a preferred aspect, the basis weight of the entire sheet constituting the front girdle area in front of the front edge of the absorbent core is higher than the basis weight of the sheets constituting the area behind the rear girdle area, This rear region overlaps the aforementioned front region in a state of being folded along the aforementioned fold line.

According to this aspect, by increasing the basis weight of the sheet in the front area, the body fluids attached to the skin can be completely wiped off using the front area.

According to a preferred aspect, the difference between the distance from the fold line to the rear edge of the absorbent core and the distance from the fold line to the front edge of the absorbent core is longer than the second distance.

According to this aspect, the difference between the distance from the fold line to the rear end edge of the absorbent core and the distance from the fold line to the front end edge of the absorbent core is greater than the second distance from the rear end edge of the absorbent core to the rear end edge of the rear body area. The longer, and therefore more rigid, absorbent core extends longer toward the rear of the rear girth area. In this case, when the absorbent article is pulled up to the waist height of the wearer by grasping the vicinity of the side locking portion, the pulling force can be fully transmitted to the absorbent core arranged in the rear girth area. In this way, it becomes easier to pull the absorbent core upward over the bulge of the wearer's buttocks.

According to a preferred aspect, the elastic yarn non-arrangement area without elastic yarn is a continuous area accounting for at least 30% of the entire front body area.

In areas with elastic yarns, a difference in shrinkage force occurs between the portion where the elastic yarns are provided and the surrounding portions. Due to this difference in shrinkage force, large unevenness occurs in the sheet between the elastic yarns. In this aspect, the non-arrangement area of elastic yarns without elastic yarns is a continuous area that accounts for at least 30% of the front body area. Therefore, in a large range of the front body area, the shrinkage force of the elastic yarn will not be generated. Caused huge bumps. In this way, the area without large unevenness becomes an area suitable for wiping the wearer's skin.

According to a preferred aspect, the elastic yarn non-arrangement area has: a stretchable sheet that can stretch in the width direction.

According to this aspect, by arranging the stretchable sheet that can expand and contract in the width direction in the elastic yarn non-arrangement area in the front body area, the front body area can expand and contract in the width direction, thereby allowing the front body area to conform to the The wearer's skin.

In addition, the stretchable sheet is intended to shrink uniformly in the range where the stretchable sheet exists. Therefore, large unevenness caused by shrinkage of the elastic yarn is less likely to occur. Therefore, using the stretch sheet allows the elastic gauze non-arrangement area of the front girdle area to conform to the wearer's skin, and maintain the elastic gauze non-arrangement area as an area suitable for wiping the wearer's skin.

According to a preferred aspect, at least a part of the elastic yarn non-arrangement area is located further forward than the center of the side locking portion in the front-rear direction.

According to this aspect, the non-arrangement area of the elastic yarn suitable for wiping the wearer's skin is located further forward (ventral). In a state where the back girdle area is padded under the wearer's buttocks and the side locking parts are torn, the operating range of the front (ventral) side of the front girdle area becomes larger. Therefore, it becomes easier for the assistant to wipe the wearer's skin with the elastic yarn non-arrangement area in a state where the side locking parts are torn.

According to a preferred aspect, the elastic yarn non-arrangement area extends from the front edge of the front body area to the rear side.

In a state where the back girdle area is padded under the wearer's buttocks and the side locking parts are torn, the operating range of the front (ventral) side of the front girdle area becomes larger. Therefore, by extending the elastic yarn non-arrangement area from the front edge of the front girdle area to the rear side, the assistant can easily wipe the wearer's skin with the elastic yarn non-arrangement area while tearing the side locking portion.

According to a preferred aspect, at least part of the elastic yarn non-arrangement area is provided in an area where the absorbent core is extended in the front-rear direction.

The area where the absorbent core is extended in the front-to-back direction is close to the area where body fluids adhering to the absorbent core will stain the wearer's skin. Therefore, by providing an elastic yarn non-arrangement area suitable for wiping the wearer's skin in the area where the absorbent core is extended in the front-to-back direction, the elastic yarn non-arrangement area is used to wipe the dirt adhering to the wearer's skin. easy.

According to a preferred aspect, at least part of the elastic yarn non-arrangement area is provided outside the absorbent core in the width direction.

The area outside the absorbent core in the width direction of the front girth area is an area that is not easily soiled by the wearer's body fluids. By arranging the elastic yarn non-arrangement area suitable for wiping the wearer's skin in such an area that is not easily stained, the clean part of the front girdle area can be used to wipe the dirt attached to the wearer's skin.

According to a preferred aspect, the non-arrangement area of the elastic yarn does not have a liquid-impermeable film.

According to this aspect, the liquid-impermeable film (harder than a sheet such as nonwoven fabric) is not provided in the elastic yarn non-arrangement area, so that the elastic yarn non-arrangement area becomes more suitable for wiping the wearer's skin.

According to a preferred aspect, the non-arrangement area of the elastic yarn has a liquid-impermeable film.

According to this aspect, there is a liquid-impermeable film in the non-arrangement area of the elastic gauze suitable for wiping the skin. When the assistant uses the elastic gauze non-arrangement area to wipe the body fluid adhered to the wearer's skin, the elasticity can be suppressed. The body fluid attached to the gauze non-arrangement area passes through the sheet constituting the elastic gauze non-arrangement area along the thickness direction and adheres to the assistant's hand.

(2) Structure of absorbent articles Hereinafter, the absorbent article according to the embodiment will be described with reference to the drawings. In the description of the following drawings, the same or similar parts are denoted by the same or similar symbols. However, it should be noted that the drawings are for illustration only, and the ratios of various dimensions may differ from the actual ones. Therefore, specific dimensions, etc. should be judged with reference to the following description. In addition, the drawings may include parts with different dimensional relationships and ratios.

Fig. 1 is a schematic diagram of an absorbent article according to an embodiment. Fig. 2 is a developed plan view of the absorbent article according to one embodiment. FIG. 2 shows an expanded state in which the absorbent article is expanded to a state where wrinkles are not formed in the expanded state in which the side locking portions described below are expanded. FIG. 3 is a cross-sectional view of the absorbent article along line A-A in FIG. 1 . Figure 4 is a schematic side view of the absorbent article folded in half along the fold line. FIG. 4 is a schematic diagram showing the length relationship of the absorbent core 51 to be described later, the front body member 20 to be described later, and the rear body member 30 to be described later. In FIG. 4 , structures other than these members are not shown for simplicity.

In the unfolded state, the absorbent article 10 has the front-rear direction L and the width direction W which are orthogonal to each other. The anteroposterior direction L is defined by directions extending toward the front (ventral) side of the body and the back (dorsal) side of the body. In other words, the front-to-back direction L is the direction in which the unfolded absorbent article 10 extends forward and backward. Furthermore, the absorbent article 10 has a thickness direction T orthogonal to both the front-rear direction L and the width direction W.

The absorbent article 10 has a front girth area S1, a rear girth area S2, and a crotch area S3. The front girth area S1 is an area facing the wearer's front girth. The rear girth area S2 is an area facing the wearer's rear girth. The crotch region S3 is a region located under the wearer's crotch and arranged between the front girdle region S1 and the rear girdle region S2.

In this embodiment, the absorbent article 10 may have the front body member 20, the rear body member 30, and the absorbent main body 40. The front trunk member 20 is arranged in the front trunk area S1. The rear trunk member 30 is arranged in the rear trunk area S2. The front body member 20 and the rear body member 30 may be made of, for example, a nonwoven fabric-like sheet.

The fold line FL dividing the absorbent article 10 into front and rear halves can pass through the crotch area S3. The fold line FL extends along the width direction W. That is, in the state shown in FIG. 1 , the absorbent article 10 is folded in half using the folding line FL extending in the width direction W as a base point.

Side locking parts 60 may be provided at the end of the front body area S1 in the width direction W and at the end of the rear body area S2 in the width direction W. The side locking portion 60 is defined by a portion that locks the end portion of the front body area S1 in the width direction W and the end portion of the rear body area S2 in the width direction W with each other.

The end portion of the front girdle area S1 in the width direction W and the end portion of the rear girdle area S2 in the width direction W form a hole for wearing in the absorbent article 10 in a state where they are locked by the side locking portions 60 . The trunk opening 62 allows the wearer's trunk to pass through, and the leg openings 66 allow the wearer's legs to be inserted into one pair. The casing opening edge 64 forming the casing opening 62 may be defined by the front end edge of the front casing member 20 and the rear end edge of the rear casing member 30 . In addition, the leg opening edge 68 forming the leg opening 66 can be formed from the side 40l of the absorbent main body 40 extending in the front-rear direction L, the side 20l located on the rear side of the front body member 20, and the rear body member 20. The front side of 30 is defined by 30l.

Here, FIG. 2 shows a state after the locking of the side locking portions 60 is released and the absorbent article 10 is unfolded. The side locking portions 60 can extend in the front-rear direction L in each of the front body member 20 and the rear body member 30 . In this case, the boundary between the front trunk area S1 and the crotch area S3 can be defined by the rear end edge of the side locking portion 60 provided on the front trunk member 20 . Similarly, the boundary between the rear trunk area S2 and the crotch area S3 can be defined by the front edge of the side locking portion 60 provided on the rear trunk member 30 .

In the rear body area S2, one or a plurality of elastic members 32 that can expand and contract in the width direction W may be provided. In addition, the elastic member 32 of the rear body area S2 may also be composed of a stretchable sheet that can stretch in the width direction W.

In addition, in the front body area S1, one or a plurality of second elastic members 22 that can expand and contract in the width direction W may be provided. The second elastic member 22 is composed of elastic yarn. Furthermore, a stretchable sheet 90 that can stretch in the width direction W may be provided in the front body area S1. The elastic sheet 90 may be provided in a region that does not overlap the second elastic member 22 in the thickness direction T.

The absorbent main body 40 is disposed across the front body member 20 and the rear body member 30 . That is, the absorbent main body 40 extends across the front girth area S1, the rear girth area S2, and the crotch area S3.

The absorbent main body 40 may be configured as a separate entity from the front body member 20 and the rear body member 30 . In this case, the absorbent main body 40 may be joined to the front and rear casing members 20 and 30 in the front and rear casing areas S1 and S2, respectively.

The absorbent main body 40 includes at least the absorber 50 . Furthermore, the absorbent main body 40 may have a muscle surface sheet 41 located on the muscle surface side of the absorber 50 and a non-muscle surface sheet 42 located on the non-muscle surface side of the absorber 50 . The muscle surface sheet 41 can cover the absorber 50 on the muscle surface side of the absorber 50 . The non-muscle surface sheet 42 can cover the absorbent body 50 on the non-muscle surface side of the absorbent body 50 .

The skin sheet 41 may be made of a liquid-permeable sheet such as non-woven fabric or perforated plastic film. The muscle surface sheet 41 may be composed of one sheet. Alternatively, the muscle surface sheet 41 may be composed of a laminated sheet in which a plurality of sheets are laminated on each other.

The non-muscle surface sheet 42 may include a liquid-impermeable sheet. The liquid-impermeable sheet may be composed of a liquid-impermeable film such as a plastic film. The non-muscle surface sheet 42 may be composed of one sheet. Alternatively, the non-muscle surface sheet 42 may be composed of a laminated sheet in which a plurality of sheets are laminated on each other. In this case, at least one of the plurality of sheets may have liquid impermeability.

The absorbent body 50 may include an absorbent core 51 and a core covering 52 covering the absorbent core. The absorbent core 51 may comprise, for example, ground pulp or superabsorbent polymer (SAP), or mixtures thereof. The core covering part 52 may be made of tissue or nonwoven fabric, for example.

The absorbent core 51 is arranged in at least the crotch area S3. Preferably, the absorbent core 51 extends in the front-to-back direction L from the front body area S1 across the rear body area S2.

The absorbent core 51 may have a narrowed area narrowed inward in the width direction W at least in the crotch area S3. The narrowest part of the absorbent core 51 in the width direction W may be disposed in the crotch area S3. In this case, the fold line FL may pass through the narrowed area of the absorbent core 51 .

The absorbent main body 40 may have side sheets 43 covering both sides of the muscle surface sheet 41 in the width direction W. The side sheet 43 may be made of a sheet such as non-woven fabric or perforated plastic film.

The absorbent body 40 may have a pair of leak-proof cuffs 46. The pair of leak-proof side edges 46 extend in the front-rear direction L between the front girdle area S1 and the rear girdle area S2, and are arranged on both sides across the center of the absorbent article 10 in the width direction W. The pair of leak-proof sides 46 are defined by an erected portion (section B in Figure 2) that can be erected toward the wearer's skin.

The leakage-proof side 46 can be composed of the side sheet 43 and the third elastic member 47 provided on the side sheet 43 . The third elastic member 47 is configured to be stretchable in the front-rear direction. The third elastic member 47 may include one or a plurality of rubber threads. As a specific example, the inner portion of the side sheet 43 in the width direction W is folded outward, and the third elastic member 47 is disposed on the folded portion of the side sheet 43 . In addition, the inner edge of the side sheet 43 in the width direction W is not joined to the muscle surface sheet 41 but is configured as a free end that can stand up from the muscle surface sheet 41 .

The leakage-proof side 46 has an erecting fulcrum 46a and an erecting apex 46b. The erecting fulcrum 46a and the erecting apex 46b extend in the front-rear direction L from the front girdle area S1 across the rear girdle area S2. The erected fulcrum 46a is a point that is not erected and is equivalent to the foundation of the leak-proof side 46. In this embodiment, the raising fulcrum 46a corresponds to the edge line on the inner side in the width direction W in the joint portion of the side sheet 43 and the muscle surface sheet 41. The erected vertex 46b is equivalent to the vertex of the leak-proof side 46 when the leak-proof side 46 is erected. That is, the raised apex 46b is the free end of the leakage-proof side 46.

The absorbent main body 40 may have a pair of hems 48 in an area outside a pair of leakage-proof side edges 46 in the width direction W. The pair of frills 48 may extend in the front-rear direction L from the front body area S1 across the rear body area S2.

The pair of hems 48 may be composed of the fourth elastic member 49 attached to the sheet constituting the absorbent main body 40 . The fourth elastic member 49 may be, for example, one or a plurality of rubber threads. Alternatively, the fourth elastic member 49 may be, for example, a stretchable elastic sheet. The fourth elastic member 49 is joined to the sheet constituting the absorbent main body 40 in a state stretched from the natural state. In this way, the fourth elastic member 49 functions to shrink the absorbent main body 40 in the front-rear direction L, thereby forming a hem.

As shown in Figure 4, the first distance L1 from the front end edge of the absorbent core 51 to the front end edge of the front girdle area S1 is longer than the distance L1 from the rear end edge of the absorbent core 51 to the rear end edge of the rear girdle area S2. The second distance L2 is longer. That is, the area in which the absorbent core 51 is not present in the front body area S1 becomes larger. In this way, because the soft area in the front girdle area S1 becomes larger, the assistant will not injure the wearer's skin when taking off the absorbent article and can easily use the front girdle area S1 to wipe the wearer's skin. .

In addition, the difference L3 between the distance from the fold line FL to the rear end edge of the absorbent core 51 and the distance from the fold line FL to the front end edge of the absorbent core 51 is in the front-rear direction than the area in the front body area S1 that overlaps the absorbent core 51 The length L4 on L is longer. In this way, in a state where the absorbent article 10 is folded along the fold line FL, the absorbent core 51 extends upward (backward) longer in the rear girth region S2 than in the front girth region S1. Because the absorbent core 51 with higher rigidity extends longer toward the rear of the rear girth area S2, when the absorbent article 10 is pulled up to the waist height of the wearer by grasping the vicinity of the side locking portion 60, The pulling force can be fully transmitted to the absorbent core 51 arranged in the rear body area S2. In this way, it becomes easier to pull the absorbent core 51 upward over the bulge of the wearer's buttocks.

As described above, it is possible to provide an absorbent article 10 that is easy to put on when worn and easy to wipe off the wearer's skin when taken off.

In addition, the difference L3 between the distance from the fold line FL to the rear end edge of the absorbent core 51 and the distance from the fold line FL to the front end edge of the absorbent core 51 is larger than the distance from the rear end edge of the absorbent core 51 to the rear girdle area S2. The second distance L2 of the end edge is longer.

According to this aspect, because the difference between the distance from the fold line to the rear end edge of the absorbent core and the distance from the fold line to the front end edge of the absorbent core is 2 times greater than the distance from the rear end edge of the absorbent core to the rear end edge of the rear body area. The longer distance allows the stiffer absorbent core to extend longer toward the rear of the rear girth area. In this case, when the absorbent article is pulled up to the waist height of the wearer by grasping the vicinity of the side locking portion, the pulling force can be fully transmitted to the absorbent core arranged in the rear girth area. In this way, it becomes easier to pull the absorbent core upward over the bulge of the wearer's buttocks.

For example, in the S-size disposable diaper of the first embodiment, the first distance L1 from the front edge of the absorbent core 51 to the front edge of the front body area S1 is longer than the first distance L1 from the rear edge of the absorbent core 51 . The second distance L2 from the end edge to the rear end edge of the rear trunk area S2 is longer. In addition, the second distance L2 from the rear end edge of the absorbent core 51 to the rear end edge of the rear girdle area S2 is longer than the length L4 in the front-rear direction L of the area overlapping the absorbent core 51 in the front girdle area S1. long. In addition, the difference L3 between the distance from the fold line FL to the rear end edge of the absorbent core 51 and the distance from the fold line FL to the front end edge of the absorbent core 51 is farther in the front-to-back direction than the area in the front body area S1 that overlaps the absorbent core 51 The length L4 on L is longer. Furthermore, the difference L3 between the distance from the fold line FL to the rear end edge of the absorbent core 51 and the distance from the fold line FL to the front end edge of the absorbent core 51 is greater than the distance from the rear end edge of the absorbent core 51 to the rear body area S2 The second distance L2 of the rear end edge is longer.

On the other hand, for example, in the M size disposable diaper of the second embodiment, the first distance L1 from the front edge of the absorbent core 51 to the front edge of the front body area S1 is longer than the first distance L1 from the front edge of the absorbent core 51 The second distance L2 from the rear end edge of 51 to the rear end edge of the rear trunk area S2 is longer. In addition, the second distance L2 from the rear end edge of the absorbent core 51 to the rear end edge of the rear girdle area S2 is longer than the length L4 in the front-rear direction L of the area overlapping the absorbent core 51 in the front girdle area S1. long. However, the difference L3 between the distance from the fold line FL to the rear end edge of the absorbent core 51 and the distance from the fold line FL to the front end edge of the absorbent core 51 can also be greater in the front-to-back direction than the area in the front body area S1 that overlaps the absorbent core 51 The length L4 on L is shorter. Furthermore, the difference L3 between the distance from the fold line FL to the rear end edge of the absorbent core 51 and the distance from the fold line FL to the front end edge of the absorbent core 51 can also be compared with the distance from the rear end edge of the absorbent core 51 to the rear body area S2 The second distance L2 of the rear end edge is shorter.

The liquid-impermeable film of the non-muscle surface sheet 42 constituting the absorbent main body 40 can extend toward the front side in the front-to-back direction L to the front side of the absorbent core 51 . The area further forward than the front edge of the liquid-impermeable film constituting the non-muscle surface sheet 42 preferably accounts for more than 50% of the length of the side locking portion 60 in the front-rear direction L, and more preferably accounts for more than 60%. That is, in the front body area S1, preferably 50% or more, more preferably 60% or more of the area does not have the liquid-impermeable film. According to this aspect, the area without the liquid-impermeable film (harder than a sheet such as a general nonwoven fabric) becomes larger, so that a wider area suitable for wiping the wearer's skin can be secured.

It is preferable that the entire front region S5 of the front body region S1 located in front of the front end edge of the absorbent core 51 is composed of four or more sheets. That is, the entire front region S5 includes four or more layers of sheets that overlap each other. In a state where the rear girth region S2 is padded under the wearer's buttocks and the side locking portions 60 are torn apart, the entire front region S5 corresponds to an area that is easy to wipe the wearer's skin. When the entire area that is easy to wipe off the wearer's skin is composed of four or more layers of sheets, body fluids are less likely to penetrate and the assistant's hands are less likely to get dirty.

The number of sheets constituting the entire front region S5 is preferably the same as the rear region constituting the rear body region S2 (the region corresponding to the second distance L2 in Figure 4) that overlaps the front region S5 in a state of being folded along the fold line FL. The number of flakes is the same or less. By keeping the number of sheets in the front region S5 from being excessive, the rigidity of the front region can be suppressed from becoming too high, and body fluids adhering to the skin can be easily wiped off by the front region S5. On the other hand, the number of sheets in the rear area (corresponding to the second distance L2 in Figure 4) is not too small, and the absorbent article 10 is pulled up to the wearer when grasping the vicinity of the side locking portion 60. When the waist height is higher, it becomes easier to fully transmit the pulling force from the back area to the absorbent core 51.

The basis weight of the entire sheet constituting the front region S5 is preferably greater than the basis weight of the rear region (corresponding to the second distance L2 in Figure 4) constituting the rear body region S2 that overlaps the front region in a state of being folded along the fold line FL. The basis weight of the flakes is higher. By increasing the basis weight of the sheet in the front region S5, it becomes easier to use the front region S5 to fully wipe off the body fluids attached to the skin.

Preferably, the elastic yarn non-arrangement area 80 (the area indicated by hatched lines in FIG. 2 ) without elastic yarn is a continuous area occupying at least 30% of the entire front body area S1, and more preferably at least 50%. In areas with elastic yarns, a difference in shrinkage force occurs between the portion where the elastic yarns are provided and the surrounding portions. Due to this difference in shrinkage force, large unevenness occurs in the sheet between the elastic yarns. In this aspect, the elastic yarn non-arrangement area 80 without elastic yarn occupies a larger area. Therefore, large unevenness caused by the shrinkage force of the elastic yarn does not occur in a large range within the front body area S1. In this way, the area without large unevenness becomes an area suitable for wiping the wearer's skin.

It is preferable that at least a part of the elastic yarn non-arrangement area 80 is located further forward than the center of the side locking portion 60 in the front-rear direction L. According to this aspect, the elastic yarn non-arrangement area 80 suitable for wiping the wearer's skin is located further forward (ventral side). In a state where the back girdle area S2 is padded under the wearer's buttocks and the side locking portions 60 are torn, the operating range of the front side (ventral side) of the front girdle area becomes larger. Therefore, it becomes easier for the assistant to wipe the wearer's skin with the elastic yarn non-arrangement area 80 while tearing the side locking portion 60 .

The elastic yarn non-arrangement area 80 preferably extends from the front edge of the front body area S1 toward the rear side. In a state where the back girdle area S2 is padded under the wearer's buttocks and the side locking parts 60 are torn, the operating range of the front side (abdominal side) area of the front girdle area S1 becomes larger. Therefore, by extending the elastic yarn non-arrangement area 80 from the front edge of the front body area S1 to the rear side, the assistant can more easily wipe the elastic yarn non-arrangement area 80 when the side stopper 60 is torn. the user's skin.

At least a part of the elastic yarn non-arrangement area 80 is provided in an area in which the absorbent core 51 is extended toward the front side in the front-rear direction L. The area where the absorbent core 51 is extended in the front-to-back direction is close to the area where the body fluid adhering to the absorbent core 51 stains the wearer's skin. Therefore, by providing the elastic yarn non-arrangement area 80 suitable for wiping the wearer's skin in the area where the absorbent core 51 is extended in the front-to-back direction, the elastic yarn non-arrangement area 80 is used to wipe and adhere to the wearer's skin. dirt becomes easier.

At least a part of the elastic yarn non-arrangement area 80 is preferably provided outside the absorbent core 51 in the width direction W. The area outside the absorbent core 51 in the width direction W in the front body area S1 is an area that is not easily soiled by the wearer's body fluids. By arranging the elastic yarn non-arrangement area 80 suitable for wiping the wearer's skin in such an area that is not easily stained, the clean part of the front girdle area can be used to wipe the dirt attached to the wearer's skin.

It is more preferable that the elastic yarn non-arrangement area 80 extends across the outside of the absorbent core 51 in the width direction W from the center in the width direction W. In this case, the elastic yarn non-arrangement area 80 becomes larger in the width direction, and according to the assistant's preference, a part of the elastic yarn non-arrangement area 80 can be used to wipe off dirt adhering to the wearer's skin.

The elastic yarn non-arrangement area 80 preferably has a stretchable sheet 90 that can stretch in the width direction W. By arranging the elastic sheet 90 that can expand and contract in the width direction W in the elastic yarn non-arrangement area 80 in the front body area S1, the front body area S1 can expand and contract in the width direction W, thereby making it easier to expand the front body area S1. Adhere to the wearer's skin.

In addition, the stretchable sheet 90 is intended to shrink uniformly in the range where the stretchable sheet 90 exists. Therefore, large unevenness caused by shrinkage of the elastic yarn is less likely to occur. Therefore, the stretchable sheet 90 allows the elastic yarn non-arrangement area 80 of the front body region S1 to conform to the wearer's skin, and maintain the elastic yarn non-arrangement area 80 as an area suitable for wiping the wearer's skin.

The elastic yarn non-arrangement area 80 preferably does not have a liquid-impermeable film. That is, the casing member 20 in front of the elastic yarn non-arrangement area 80 does not have a liquid-impermeable film, and may be made of, for example, a liquid-permeable nonwoven fabric. Furthermore, as mentioned above, although the non-muscle surface sheet 42 of the absorbent main body 40 has a liquid-impermeable film, it is preferable that the liquid-impermeable film does not reach the elastic yarn non-arrangement area 80. When a liquid-impermeable film that is harder than a sheet such as nonwoven fabric is not provided in the elastic yarn non-arrangement area 80, the elastic yarn non-arrangement area 80 can be in a state more suitable for wiping the wearer's skin.

Instead of the above-mentioned structure, the elastic yarn non-arrangement area 80 may have a liquid-impermeable film. For example, the liquid-impermeable film of the non-muscle surface sheet 42 constituting the absorbent main body 40 can reach the elastic yarn non-arrangement area 80. When a liquid-impermeable film is present in the elastic yarn non-arrangement area 80 suitable for wiping the skin, and the assistant uses the elastic yarn non-arrangement area 80 to wipe the body fluid adhering to the wearer's skin, the elastic yarn non-arrangement area 80 can be suppressed. The body fluid adhering to the placement area 80 passes through the sheet constituting the elastic gauze non-placement area 80 in the thickness direction and adheres to the assistant's hand.

In this embodiment, the numerical value of the "length" of each part of the absorbent article 10 is calculated when the side locking parts 60 are released and unfolded, and the absorbent article 10 is stretched to the folds of the absorbent article (except for the fold line FL). ) is measured in the stretched state until it disappears.

The present invention has been described in detail using the above-mentioned embodiments. However, it is obvious to those with ordinary knowledge in the technical field that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented with modifications and changes without departing from the spirit and scope of the invention defined by the description of the patent application. Therefore, the description in this specification is for the purpose of illustration only and is not intended to limit the present invention in any way.

For example, in the above embodiment, the absorbent main body 40 is configured as a separate entity from the front body member 20 and the rear body member 30 . Alternatively, the absorbent main body 40 may be integrated with the front body member 20 and the rear body member 30 .

In addition, in the above embodiment, the absorbent article 10 is a so-called pants-type absorbent article having the side locking portions 60 . Alternatively, the absorbent article 10 may also be an adhesive type absorbent article. In this case, the absorbent article 10 may not have the side locking part 60 but may have a fastening tape for detachably fixing the front girdle area S1 and the rear girdle area S2 to each other.

Furthermore, the entire contents of Japanese Patent Application No. 2017-254069, filed on December 28, 2017, are incorporated into this specification by reference. [Industrial Applicability]

An absorbent article can be provided that allows the absorbent article to be easily put on when worn and easily wiped off the wearer's skin when removed.

10‧‧‧Absorbent articles 20‧‧‧Front body parts 22‧‧‧Second elastic member 30‧‧‧Rear body parts 32‧‧‧Elastic member 40‧‧‧Absorbent body 46‧‧‧Leak-proof sides 46b‧‧‧Put up the top 47‧‧‧The third elastic member 48‧‧‧Ruffles 49‧‧‧Fourth elastic member 50‧‧‧Absorbent 51‧‧‧Absorbent core 60‧‧‧Side locking part 80‧‧‧Elastic yarn non-arrangement area 90‧‧‧Telescopic sheet 20l, 30l‧‧‧ side 401‧‧‧Side S1‧‧‧Front enclosure area S2‧‧‧Rear enclosure area S3‧‧‧crotch area FL‧‧‧polyline L‧‧‧forward and backward direction W‧‧‧width direction T‧‧‧Thickness direction

Figure 1 is a schematic diagram of an absorbent article according to an embodiment. Fig. 2 is a developed plan view of the absorbent article according to the embodiment. FIG. 3 is a cross-sectional view of the absorbent article along line A-A in FIG. 1 . Figure 4 is a schematic side view of the folded absorbent article.

10‧‧‧Absorbent articles

20‧‧‧Front body parts

22‧‧‧Second elastic member

30‧‧‧Rear body parts

32‧‧‧Elastic member

40‧‧‧Absorbent body

46‧‧‧Leak-proof sides

46b‧‧‧Put up the top

47‧‧‧The third elastic member

48‧‧‧Ruffles

49‧‧‧Fourth elastic member

50‧‧‧Absorbent

60‧‧‧Side locking part

80‧‧‧Elastic yarn non-arrangement area

90‧‧‧Telescopic sheet

20l, 30l‧‧‧ side

401‧‧‧Side

S1‧‧‧Front enclosure area

S2‧‧‧Rear enclosure area

S3‧‧‧crotch area

FL‧‧‧polyline

L‧‧‧forward and backward direction

W‧‧‧width direction

Claims (13)

An absorbent article having a front-to-back direction, a width direction orthogonal to the front-to-back direction, a front girth area, a rear girth area, a crotch area disposed between the front girth area and the rear girth area, and a crotch area. In the side locking portions that lock the front girdle area and the rear girdle area, and in the absorbent core provided at least in the crotch area, the folding line for folding the absorbent article in half is along the edge of the crotch area. Extending in the aforementioned width direction, the first distance from the front edge of the aforementioned absorbent core to the front edge of the aforementioned front girdle area is longer than the second distance from the rear end edge of the aforementioned absorbent core to the rear end edge of the aforementioned rear girdle area. The distance is longer. The difference between the distance from the aforementioned fold line to the rear end edge of the aforementioned absorbent core and the distance from the aforementioned fold line to the aforementioned front end edge of the aforementioned absorbent core is greater than the aforementioned difference between the aforementioned front body area and the aforementioned area that overlaps the aforementioned absorbent core. The length in the front-to-back direction is longer, and the number of sheets constituting the entire area in front of the front edge of the absorbent core in the front girdle area is the same as the number of sheets constituting the area behind the rear girdle area, or More preferably, the rear area is repeated with the front area in a state of being folded along the fold line. The absorbent article according to claim 1, further comprising an absorbent main body including the absorbent core and a liquid-impermeable sheet disposed on the non-skin surface side of the absorbent core. The area of the film on the front side of the front edge of the liquid-impermeable film accounts for more than 50% of the length of the side locking portion in the front-rear direction. The absorbent article according to claim 1 or 2, wherein the entire front body region in front of the front end edge of the absorbent core is composed of four or more sheets. The absorbent article according to claim 1 or 2, wherein the basis weight of the entire sheet constituting the front girdle area in front of the front end edge of the absorbent core is greater than the basis weight of the area behind the rear girdle area. The basis weight of the sheet is higher, and the rear region is repeated with the aforementioned front region in a state of being folded along the aforementioned fold line. The absorbent article according to claim 1 or 2, wherein the difference between the distance from the fold line to the rear edge of the absorbent core and the distance from the fold line to the front edge of the absorbent core is greater than the second distance longer. The absorbent article according to claim 1 or 2, wherein the elastic yarn non-arrangement area without elastic yarn is a continuous area accounting for at least 30% of the entire front girth area. The absorbent article as described in claim 6, wherein, The elastic yarn non-arrangement area has a stretchable sheet that can stretch in the width direction. The absorbent article according to claim 6, wherein at least a part of the elastic yarn non-arrangement area is located further forward than the center of the side locking portion in the front-rear direction. The absorbent article according to claim 6, wherein the elastic yarn non-arrangement area extends from the front end edge of the front body area to the rear side. The absorbent article according to claim 6, wherein at least a part of the elastic yarn non-arrangement area is provided in an area where the absorbent core is extended in the front-rear direction. The absorbent article according to claim 6, wherein at least part of the elastic yarn non-arrangement area is provided outside the absorbent core in the width direction. The absorbent article according to claim 6, wherein the elastic yarn non-arrangement region does not have a liquid-impermeable film. The absorbent article according to claim 6, wherein the elastic yarn non-arrangement region has a liquid-impermeable film.